CN110318057B - Cold-forming hot-rolling acid-washing high-strength steel antirust liquid, and preparation method and application thereof - Google Patents
Cold-forming hot-rolling acid-washing high-strength steel antirust liquid, and preparation method and application thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
- C23F11/187—Mixtures of inorganic inhibitors
- C23F11/188—Mixtures of inorganic inhibitors containing phosphates
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Abstract
A cold-forming hot-rolling acid-washing high-strength steel antirust liquid, a preparation method and application thereof relate to the technical field of antirust treatment in hot-rolling, and the antirust liquid comprises a microemulsion, a phosphoric acid mixed solution and dimethyldichlorosilane, wherein the microemulsion takes propylene glycol as a solvent and contains glucose and fatty acid methyl ester; the phosphoric acid mixed solution contains 0.5-2 wt.% phosphoric acid solution as a solvent, and lauric acid monoester, palmitic acid monoester and stearic acid triester. The antirust liquid can be used for carrying out long-acting antirust on cold-formed hot-rolled pickled high-strength steel, the treated cold-formed hot-rolled pickled high-strength steel has good mechanical properties and good antirust effect, the operation is simple, the production and treatment cost is low, the antirust liquid belongs to a green and environment-friendly production process of steel, and good social benefits and environmental benefits are achieved.
Description
Technical Field
The invention belongs to the technical field of rust prevention treatment in hot rolling, and particularly relates to a cold-forming hot-rolling acid-washing high-strength steel rust prevention liquid, and a preparation method and application thereof.
Background
As a basic industry of China, the steel industry is rapidly developed since the innovation is opened, and is always in a high-speed development stage in recent years, and the annual steel yield is increased by 15-22%.
The cold-forming hot-rolling acid-washing high-strength steel has the advantages of high strength, excellent processing performance and the like, and is widely applied to a plurality of manufacturers such as automobiles and the like.
The cold-formed hot-rolled pickled high-strength steel obtained by the chemical components and the production process of the current hot-rolled pickled high-strength steel has poor corrosion resistance, and particularly, the product can generate surface corrosion after being placed in an environment with high humidity for a period of time.
The surface corrosion of steel products is always an important quality problem concerned by users of steel production plants, automobiles and the like, and the corrosion can influence the smooth production of the steel production plants on one hand, bring great influence to the use of the users on the other hand, and even directly cause the users to be incapable of normally using the steel products, thereby causing the complaints of the users and reducing the share of the steel production plants.
In the existing rust-proof treatment, the used inorganic rust-proof liquid plays a positive role in the rust-proof treatment of steel products, but the application conditions of the products are harsh, the effect on light-rust steel is better, and the conversion effect on rust is not thorough. In addition, although components of inorganic rust preventive solutions are mainly nitrite and chromate, their application is limited due to problems such as toxicity and contamination of nitrite and chromate.
Disclosure of Invention
The invention aims to provide a cold-forming hot-rolling acid-washing high-strength steel antirust liquid, a preparation method and application thereof, which solve the problem that cold-forming hot-rolling acid-washing high-strength steel is easy to rust, can carry out long-acting rust prevention on the cold-forming hot-rolling acid-washing high-strength steel, and the treated cold-forming hot-rolling acid-washing high-strength steel not only has good mechanical property, but also has good antirust effect, is simple in operation and low in production and treatment cost, belongs to a steel green environment-friendly production process, and has good social benefit and environmental benefit.
In order to achieve the purpose, the invention provides the following technical scheme:
the cold-forming hot-rolling acid-washing high-strength steel antirust liquid comprises a microemulsion, a phosphoric acid mixed solution and dimethyldichlorosilane, wherein the volume ratio of the microemulsion to the phosphoric acid mixed solution is as follows: microemulsion: dimethyldichlorosilane ═ 1: 0.025 to 0.26: 0.004-0.02;
the microemulsion takes propylene glycol as a solvent, and each liter of propylene glycol contains 15-45 g of glucose and 23-55 g of fatty acid methyl ester;
the phosphoric acid mixed solution takes 0.5-2 wt.% phosphoric acid solution as a solvent, and each liter of the 0.5-2 wt.% phosphoric acid solution contains 35-190 mg of lauric acid monoester, 145-270 mg of palmitic acid monoester and 95-170 mg of stearic acid triester.
Further, the preparation method of the microemulsion comprises the following steps: adding glucose and fatty acid methyl ester into propylene glycol, and stirring for 2-3 hours at the temperature of 145-165 ℃ and the pressure of 0.6-0.9 MPa to form microemulsion.
Preferably, the volume ratio of the phosphoric acid mixed solution, the microemulsion and the dimethyldichlorosilane is phosphoric acid mixed solution: microemulsion: dimethyldichlorosilane ═ 1: 0.07-0.12: 0.009-0.013.
Further, the surface tension of the cold-forming hot-rolling acid-washing high-strength steel antirust liquid is 59.4-76.5 mN/m.
The antirust liquid is a water-based antirust liquid, which is based on water, takes sucrose fatty acid ester as a main antirust component, is added with various antirust additives, forms sucrose fatty acid ester by the ester exchange of glucose and fatty acid methyl ester in a microemulsion environment, has excellent antirust performance and low toxicity, and is an environment-friendly chemical. The rust prevention principle of the rust prevention liquid is as follows: the water-based antirust liquid is soaked on the surface of a workpiece, organic components in a film forming substance can form a layer of protective film in the drying process, an antioxidant and an anticorrosive agent are coated on the surface of the workpiece in the protective film, and the protective film plays a role in preventing oxygen from contacting the surface of the workpiece to achieve the purpose of rust prevention.
The invention provides a preparation method of cold-forming hot-rolling acid-washing high-strength steel antirust liquid, which comprises the following steps:
1) preparation of microemulsions
Adding glucose and fatty acid methyl ester into propylene glycol, and stirring for 2-3 hours at the temperature of 145-165 ℃ and the pressure of 0.6-0.9 MPa to form microemulsion;
wherein the addition amount of the glucose and the fatty acid methyl ester is as follows: each liter of propylene glycol contains 15-45 g of glucose and 23-55 g of fatty acid methyl ester;
2) preparing phosphoric acid mixed liquor
Adding 35-190 mg/L of lauric acid monoester, 145-270 mg/L of palmitic acid monoester and 95-170 mg/L of stearic acid triester into 0.5-2 wt.% of phosphoric acid solution, and stirring at the speed of 110-130 r/min for 20-40 min to obtain a phosphoric acid mixed solution;
3) mixing
Heating the phosphoric acid mixed solution in the step 2) to 45-55 ℃, dropwise adding the microemulsion in the step 1) while stirring, and stirring for 40-70 min after dropwise adding, wherein the stirring speed is 40-60 revolutions per minute, so as to obtain a reaction solution;
cooling the reaction liquid to 35 ℃, adding dimethyldichlorosilane while stirring, stirring at the speed of 60-80 revolutions per minute for 20-40 min, and cooling to room temperature after stopping to form antirust liquid;
wherein, phosphoric acid mixed solution: microemulsion: dimethyldichlorosilane ═ 1: 0.025 to 0.26: 0.004-0.02 volume ratio.
Preferably, the phosphoric acid mixed solution: microemulsion: dimethyldichlorosilane ═ 1: 0.06-0.21: 0.008-0.015 percent by volume ratio.
The antirust liquid is used for the antirust treatment of cold-forming hot-rolling acid-washing high-strength steel.
The invention provides an antirust method for applying antirust liquid to cold-forming hot-rolling acid-washing high-strength steel, which comprises the following steps:
a) heating and rolling
Putting the continuous casting slab into a heating furnace for heating, wherein the tapping temperature is 1150-1250 ℃, and then carrying out hot rolling, wherein the final rolling temperature is controlled at 750-960 ℃;
b) acid pickling
Carrying out turbulent pickling on the plate blank cooled to room temperature, wherein the pickling speed is 190-230 m/min, the pickling concentration is 6-11%, the pickling temperature is 70-90 ℃, and the strip steel tension is 9.8-11.8 MPa;
c) spraying antirust liquid
Spraying antirust liquid to the pickled plate blank, wherein the spraying pressure is 0.9-1.1 Mpa;
d) blowing and coiling
The slab is heated and blown by steam and then coiled, wherein the steam blowing temperature is 115-130 ℃, and the blowing flow at the edge part is 9000-12000 m3/h。
Preferably, in the step c), 3-5 rows of nozzles are arranged, and the distance between the nozzles is 20-25 mm.
Further, in the continuous casting slab, the chemical components in percentage by mass are as follows: c: 0.06-0.08%, S: 0.005-0.008%, P: 0.01 to 0.02%, Mn: 0.9-1.2%, Si: 0.1-0.3%, Al: 0.04-0.06%, Nb: 0.04-0.05%, and the balance of Fe and inevitable impurities.
In the purging process, the invention ensures that no obvious antirust liquid is left on the surface of the cold-forming hot-rolling acid-washing high-strength steel.
Compared with the prior art, the invention has the following beneficial effects:
by using the antirust liquid, organic substances can form a layer of protective film, an antioxidant and an anticorrosive agent are wrapped on the surface of a workpiece in the protective film, the protective film prevents oxygen from contacting the surface of the workpiece, long-acting antirust can be performed on cold-formed hot-rolled pickled high-strength steel, and the treated cold-formed hot-rolled pickled high-strength steel not only has good mechanical property, but also has good antirust effect, is simple to operate and low in production and treatment cost, belongs to a steel green and environment-friendly production process, and has good social benefit and environmental benefit.
After the treatment of the antirust liquid, the cold-formed hot-rolled pickled high-strength steel has no corrosion for 72 hours at the temperature of 49 ℃ and the relative humidity of 98%.
Drawings
FIG. 1 is a flow chart of an anti-rust process of cold-formed hot-rolled pickled high-strength steel in the embodiment of the invention.
Detailed Description
The present invention will be further described with reference to the following examples.
Embodiment 1 a method for preparing a cold-forming hot-rolling acid-washing high-strength steel antirust fluid of the present invention:
1) preparation of microemulsions
To propylene glycol was added glucose in an amount of 32 g per liter of propylene glycol solution and fatty acid methyl ester in an amount of 51 g per liter of propylene glycol solution.
Rapidly stirring for 2 hours at the temperature of 150 ℃ and the pressure of 0.6MPa to form microemulsion, and carrying out ester exchange on glucose and fatty acid methyl ester in the environment of the microemulsion to form sucrose fatty acid ester.
2) Preparing phosphoric acid mixed liquor
A phosphoric acid solution having a concentration of 1.1% was prepared, 135mg/L of lauric monoester, 230mg/L of palmitic monoester and 160mg/L of stearic triester were added to the phosphoric acid solution, and the mixture was stirred at 120 rpm for 35 minutes to obtain a phosphoric acid mixed solution.
3) Mixing
Then, 1L of the phosphoric acid mixed solution is placed into a heating kettle, the temperature is raised to 50 ℃, 78ml of microemulsion is dripped under stirring, and the stirring is carried out for 65min after the dripping is finished, wherein the stirring speed is 50 r/min.
And finally, reducing the temperature of the reaction kettle to 35 ℃, adding 13mL of dimethyldichlorosilane under stirring, stirring at the speed of 60 r/min for 35min, and cooling to room temperature after stopping stirring to form the antirust liquid, wherein the prepared antirust liquid is colorless in appearance and has surface tension of 63.7 mN/m.
The rust-proof liquid of the embodiment is used for rust-proof treatment of cold-forming hot-rolling acid-washing high-strength steel, and the process steps comprise heating, hot rolling, acid washing, spraying of the rust-proof liquid, purging and cooling, and coiling, and refer to fig. 1, wherein 1, 2, rollers, 3, a pickling tank, 4, a rust-proof liquid spraying process section, 5, 6, a purging and cooling process section, and 7, a coiling machine.
The continuous casting slab comprises the following chemical components in percentage by mass: c: 0.06%, S: 0.006%, P: 0.01%, Mn: 1.2%, Si: 0.1%, Al: 0.04%, Nb: 0.04%, and the balance of Fe and inevitable impurities.
The continuous casting plate blank with the components is put into a heating furnace to be heated, the tapping temperature is 1250 ℃, and then hot rolling is carried out, and the final rolling temperature is controlled at 860 ℃.
And (3) pickling the plate blank cooled to room temperature in a pickling tank, wherein the pickling tank adopts turbulent pickling, the pickling speed is 210m/min, the pickling concentration is 7%, the pickling temperature is 75 ℃, and the strip steel tension is 10.2 MPa.
After acid washing, the mixture enters an antirust liquid spraying process section, the upper part and the lower part of the antirust liquid spraying process section are provided with 3 rows of nozzles, the distance between every two rows of nozzles is 22mm, and the spraying pressure is 0.9 Mpa.
After the antirust agent spraying process section, the plate blank enters a sweeping process section, the steam sweeping temperature of the heating sweeping process section is 125 ℃, and the sweeping flow of the edge part is 9000m 3/h. The purpose of the process section is to ensure that no obvious antirust liquid is left on the surface of the cold-forming hot-rolling acid-washing high-strength steel.
And finally, coiling the cold-formed hot-rolled pickled high-strength steel by a coiling machine, packaging and transporting to a user.
After the treatment by the process, the cold-formed hot-rolled pickled high-strength steel has no corrosion for 72 hours at the temperature of 49 ℃ and the relative humidity of 98 percent.
Example 2
The invention discloses a preparation method of a cold-forming hot-rolling acid-washing high-strength steel antirust liquid, which comprises the following steps:
1) preparation of microemulsions
To propylene glycol was added glucose in an amount of 42 g per liter of propylene glycol and fatty acid methyl ester in an amount of 38 g per liter of propylene glycol.
Rapidly stirring for 3 hours at the temperature of 147 ℃ and the pressure of 0.7MPa to form microemulsion, forming sucrose fatty acid ester by ester exchange of glucose and fatty acid methyl ester in the environment of the microemulsion, and 2) preparing phosphoric acid mixed solution
Preparing a phosphoric acid solution with the concentration of 1.7 wt.%, adding 111mg/L of lauric acid monoester, 220mg/L of palmitic acid monoester and 145mg/L of stearic acid triester to the 1.7 wt.% phosphoric acid solution, and stirring at the speed of 125 revolutions per minute for 35 minutes to obtain a phosphoric acid mixed solution.
3) Mixing
And (3) putting 1L of the phosphoric acid mixed solution into a heating kettle, heating to 50 ℃, dropwise adding 185mL of sucrose fatty acid ester under stirring, and stirring again for 65min after dropwise adding, wherein the stirring speed is 55 revolutions per minute.
And finally, cooling the temperature of the reaction kettle to 35 ℃, adding 12mL of dimethyldichlorosilane under stirring, stirring at the speed of 75 r/min for 35min, and cooling to room temperature after stopping stirring to form the antirust liquid, wherein the prepared antirust liquid is light yellow in appearance and has the surface tension of 71.1 mN/m.
The rust-proof liquid of the embodiment is used for rust-proof treatment of cold-forming hot-rolling acid-washing high-strength steel, and the process steps comprise heating, hot rolling, acid washing, spraying the rust-proof liquid, blowing, cooling and coiling.
The continuous casting slab comprises the following chemical components in percentage by mass: c: 0.07%, S: 0.007%, P: 0.02%, Mn: 1.0%, Si: 0.3%, Al: 0.05%, Nb: 0.05%, the balance being Fe and unavoidable impurities.
The continuous casting slab with the components is put into a heating furnace to be heated, the tapping temperature is 1250 ℃, and then hot rolling is carried out, wherein the final rolling temperature is controlled at 880 ℃.
And (3) pickling the plate blank cooled to room temperature in a pickling tank, wherein the pickling tank adopts turbulent pickling, the pickling speed is 210m/min, the pickling concentration is 10%, the pickling temperature is 87 ℃, and the strip steel tension is 10.9 MPa.
After acid washing, the mixture enters an antirust liquid spraying process section, the upper part and the lower part of the antirust liquid spraying process section are provided with 3 rows of nozzles, the distance between every two rows of nozzles is 22mm, and the spraying pressure is 1.1 Mpa.
After the antirust agent spraying process section, the plate blank enters a sweeping process section, the steam sweeping temperature of the heating sweeping process section is 120 ℃, and the edge sweeping flow is 11500m3And h, ensuring that no obvious antirust liquid is left on the surface of the cold-formed hot-rolled pickled high-strength steel, and finally, coiling the cold-formed hot-rolled pickled high-strength steel by a coiling machine, packaging and transporting the cold-formed hot-rolled pickled high-strength steel to a user.
After the treatment by the process, the cold-formed hot-rolled pickled high-strength steel has no corrosion for 72 hours at the temperature of 49 ℃ and the relative humidity of 98 percent.
1) preparation of microemulsions
Adding glucose and fatty acid methyl ester into propylene glycol, wherein the adding amount of the glucose is 15 g per liter of propylene glycol solution, and the adding amount of the fatty acid methyl ester is 25 g per liter of propylene glycol solution.
Rapidly stirring for 2 hours at the temperature of 150 ℃ and the pressure of 0.6MPa to form microemulsion, and carrying out ester exchange on glucose and fatty acid methyl ester in the environment of the microemulsion to form sucrose fatty acid ester.
2) Preparing phosphoric acid mixed liquor
A phosphoric acid solution having a concentration of 0.5% was prepared, and 40mg/L of lauric monoester, 150mg/L of palmitic monoester and 98mg/L of stearic triester were added to the phosphoric acid solution, and the mixture was stirred at 120 rpm for 35 minutes to obtain a phosphoric acid mixed solution.
3) Mixing
Then, 1L of the phosphoric acid mixed solution is placed into a heating kettle, the temperature is raised to 50 ℃, 210ml of microemulsion is dripped under stirring, and stirring is carried out for 65min after the dripping is finished, wherein the stirring speed is 50 r/min.
And finally, cooling the temperature of the reaction kettle to 35 ℃, adding 4mL of dimethyldichlorosilane under stirring, stirring at the speed of 60 r/min for 35min, and cooling to room temperature after stopping stirring to form the antirust liquid, wherein the prepared antirust liquid is colorless in appearance and has surface tension of 59.5 mN/m.
Claims (10)
1. The cold-forming hot-rolling acid-washing high-strength steel antirust liquid comprises a microemulsion, a phosphoric acid mixed solution and dimethyldichlorosilane, wherein the volume ratio of the microemulsion to the phosphoric acid mixed solution is as follows: microemulsion: dimethyldichlorosilane ═ 1: 0.025 to 0.26: 0.004-0.02;
the microemulsion takes propylene glycol as a solvent, and each liter of propylene glycol contains 15-45 g of glucose and 23-55 g of fatty acid methyl ester;
the phosphoric acid mixed solution takes 0.5-2 wt.% phosphoric acid solution as a solvent, and each liter of the 0.5-2 wt.% phosphoric acid solution contains 35-190 mg of lauric acid monoester, 145-270 mg of palmitic acid monoester and 95-170 mg of stearic acid triester.
2. The cold-forming hot-rolling acid-washing high-strength steel antirust liquid as claimed in claim 1, wherein the preparation method of the microemulsion is as follows: adding glucose and fatty acid methyl ester into propylene glycol, stirring for 2-3 hours at the temperature of 145-165 ℃ and the pressure of 0.6-0.9 MPa, wherein the stirring speed is 35-55 revolutions per minute, and microemulsion is formed in the stirring process.
3. The cold-forming hot-rolling acid-washing high-strength steel antirust liquid as claimed in claim 1, wherein the volume ratio of the phosphoric acid mixed liquid to the microemulsion to the dimethyldichlorosilane is phosphoric acid mixed liquid: microemulsion: dimethyldichlorosilane ═ 1: 0.07-0.12: 0.009-0.013.
4. The cold-forming hot-rolling acid-washing high-strength steel antirust liquid as claimed in claim 1, wherein the surface tension of the cold-forming hot-rolling acid-washing high-strength steel antirust liquid is 59.4-76.5 mN/m.
5. The method for preparing the cold-forming hot-rolling acid-washing high-strength steel antirust fluid as described in any one of claims 1 to 4, comprising the following steps:
1) preparation of microemulsions
Adding glucose and fatty acid methyl ester into propylene glycol, and stirring for 2-3 hours at the temperature of 145-165 ℃ and the pressure of 0.6-0.9 MPa to form microemulsion;
wherein the addition amount of the glucose and the fatty acid methyl ester is as follows: each liter of propylene glycol contains 15-45 g of glucose and 23-55 g of fatty acid methyl ester;
2) preparing phosphoric acid mixed liquor
Adding 35-190 mg/L of lauric acid monoester, 145-270 mg/L of palmitic acid monoester and 95-170 mg/L of stearic acid triester into 0.5-2 wt.% of phosphoric acid solution, and stirring at the speed of 110-130 r/min for 20-40 min to obtain a phosphoric acid mixed solution;
3) mixing
Heating the phosphoric acid mixed solution in the step 2) to 45-55 ℃, dropwise adding the microemulsion in the step 1) while stirring, and stirring for 40-70 min after dropwise adding, wherein the stirring speed is 40-60 revolutions per minute, so as to obtain a reaction solution;
cooling the reaction liquid to 27-35 ℃, adding dimethyldichlorosilane while stirring, stirring at the speed of 60-80 revolutions per minute for 20-40 min, and cooling to room temperature after stopping to form an antirust liquid;
wherein, phosphoric acid mixed solution: microemulsion: dimethyldichlorosilane ═ 1: 0.025 to 0.26: 0.004-0.02 volume ratio.
6. The method for preparing the cold-forming hot-rolling acid-washing high-strength steel antirust liquid according to claim 5, wherein the phosphoric acid mixed liquid is: microemulsion: dimethyldichlorosilane ═ 1: 0.07-0.12: 0.009-0.013, volume ratio.
7. The rust inhibitive liquid according to any one of claims 1 to 4, which is used in rust inhibitive treatment of cold-formed hot-rolled pickled high-strength steel.
8. The rust inhibitive method of cold forming hot rolling pickled high strength steel using the rust inhibitive liquid according to any one of claims 1 to 4, comprising the steps of:
a) heating and rolling
Putting the continuous casting slab into a heating furnace for heating, wherein the tapping temperature is 1150-1250 ℃, and then carrying out hot rolling, wherein the final rolling temperature is controlled at 750-960 ℃;
b) acid pickling
Carrying out turbulent acid washing on the plate blank cooled to room temperature, wherein the acid washing speed is 190-230 m/min, the acid washing solution concentration is 6-11%, the acid washing temperature is 70-90 ℃, and the strip steel tension is 9.8-11.8 MPa;
c) spraying antirust liquid
Spraying antirust liquid to the pickled plate blank, wherein the spraying pressure is 0.9-1.1 Mpa;
d) blowing and coiling
The slab is heated and blown by steam and then coiled, wherein the steam blowing temperature is 115-130 ℃, and the blowing flow at the edge part is 9000-12000 m3/h。
9. The rust preventive method for cold-formed, hot-rolled and pickled high-strength steel using the rust preventive liquid according to claim 8, wherein in step c), 3 to 5 rows of nozzles are provided, and the pitch of the nozzles is 20 to 25 mm.
10. The rust prevention method for cold-forming hot-rolling pickled high-strength steel by using the rust prevention liquid according to claim 8 or 9, wherein in the continuous casting slab in the step a), the chemical components comprise the following components in percentage by mass: c: 0.06-0.08%, S: 0.005-0.008%, P: 0.01 to 0.02%, Mn: 0.9-1.2%, Si: 0.1-0.3%, Al: 0.04-0.06%, Nb: 0.04-0.05%, and the balance of Fe and inevitable impurities.
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| CN201810275289.6A CN110318057B (en) | 2018-03-30 | 2018-03-30 | Cold-forming hot-rolling acid-washing high-strength steel antirust liquid, and preparation method and application thereof |
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